Reflector



C. A. CAMPBELL.

REFLECTOR.

APPLICATION man AUG.23, 1919.

Patented Dec. 7, 1920.

INVENTOR mm? SA Cam 1356a,

Y A TTORNEY illustrated in the UNHTED STATES- PATENT OFFICE.

- REFLECTOR.

Specification of Letters Patent.

Patented Dec. 7, 1920.

Application filed August 23, 1919. Serial No. 819,360.

of an electric light bulb and the whole within a glass or porcelain globe, aswill be more fully described in the following specification, set forth in the appended claims: and accompanying drawings wherein:

Figure 1 is a vertical sectional view through an electric light globe showing the reflector in section,

Fig. 2 is a plan view of the reflector,

Fig. 3 is aside elevation of the same-show-- ing it applied to theshank of a bulb.

Fig. 4 shows a modified form of reflector and where the same is made concave.

r In the translucent or transparent globes, a'hdparticularly the former and which incloses an incandescent electric lamp, a great deal of the light rays are absorbed in'themetal cap whichcloses the opening to the globe and its distance from the filament and irregular shape makeit incapable of performing'the reflection function. As a consequence a great amount of the lighting power of the lamp is wasted and only the direct rays from the lamp are thrown on and through the globe.

To utilize the upper part of the globe 5, for reflective purposes, the bulb 6, carries on its shank 7, the disk 8, preferably of flexible metal and having a reflective surface on one or both of its sides. At its center is an opening 9, through. which the shank passes and from the edges of this hole are cut the fingers 10, the incisions for the cut penetrating the disk for about half the length of the fingers and to strengthen the latter at the points where the most strain is put upon them, they, are made wedge shaped so that shown in Fig. 1, the reflector is of a diameter that permits its entrance through the opening 12 of the globe and the whole device is assembled by applying the disk 8,

to the shank 7, when the fingers will spring upward and create enough friction to remain where originally located. .Theplug 13, is then screwed into the cap 14, and the I latter secured about the head'15, by the screws 16.-

By adjusting the disk up or down the shank, .the proper distance may be secured for its .most efficient service as a reflector and, as shown in Fig. 3, it may be set at an angle when it is desired .to throw the rays in anyiparticular direction.

The disk also-protects the cap 14, from the heat of the light rays to which it would be otherwise exposed and consequently prevents the deterioration of the same and undue expansion and contraction, at the same time, the danger from fire, in consequence of excessive heat, is eliminated. v

Itis obvious. that the disk may bedished in order to concentrate the light rays and that other modifications and arrangements may be resorted to Without departing from the essential features above described.

What Iclaim as new is:

1. In a reflector, the combination of lighting means having a shank, a disk with an opening adapted to fit about the shank and adjustable at various angles thereon, and fingers at the edges of the opening and adapted to engage the said shank and hold the reflector at the desired angle.

2. In a reflector, the combination of lighting means having a shank, a disk having a central opening to fit about the shank, and

,fingers cut from the disk and within the CHARLES A. CAMPBELL.

Witnesses: I I I JAMES F. DUHAMEL, WILLIAM F. DOLL. 

